Smart Coffee Table with Nano and HX711

1/**
2 *
3 * HX711 library for Arduino - example file
4 * https://github.com/bogde/HX711
5  *
6 * MIT License
7 * (c) 2018 Bogdan Necula
8 *
9**/
10#include "HX711.h"
11
12
13//  HX711 circuit wiring
14const int LOADCELL_DOUT_PIN = 2;
15const int LOADCELL_SCK_PIN  = 3;
16
17
18HX711 scale;
19
20void setup() {
21  Serial.begin(38400);
22  Serial.println("HX711 Demo");
23  pinMode(9,OUTPUT);
24   pinMode(10,OUTPUT);
25    pinMode(11,OUTPUT);
26
27  Serial.println("Initializing the scale");
28
29  // Initialize library with data output pin, clock input pin and gain factor.
30  // Channel selection is made by passing the appropriate gain:
31  // - With a  gain factor of 64 or 128, channel A is selected
32  // - With a gain factor of  32, channel B is selected
33  // By omitting the gain factor parameter, the library
34  // default "128" (Channel A) is used here.
35  scale.begin(LOADCELL_DOUT_PIN,  LOADCELL_SCK_PIN);
36
37  Serial.println("Before setting up the scale:");
38  Serial.print("read: \	\	");
39  Serial.println(scale.read());			// print  a raw reading from the ADC
40
41  Serial.print("read average: \	\	");
42  Serial.println(scale.read_average(20));  	// print the average of 20 readings  from the ADC
43
44  Serial.print("get value: \	\	");
45  Serial.println(scale.get_value(5));		//  print the average of 5 readings from the ADC minus the tare weight (not set yet)
46
47  Serial.print("get units: \	\	");
48  Serial.println(scale.get_units(5), 1);	//  print the average of 5 readings from the ADC minus tare weight (not set) divided
49						//  by the SCALE parameter (not set yet)
50
51  scale.set_scale(2280.f);                      //  this value is obtained by calibrating the scale with known weights; see the README  for details
52  scale.tare();				        // reset the scale to 0
53
54  Serial.println("After  setting up the scale:");
55
56  Serial.print("read: \	\	");
57  Serial.println(scale.read());                 // print a raw reading from the ADC
58
59  Serial.print("read  average: \	\	");
60  Serial.println(scale.read_average(20));       // print  the average of 20 readings from the ADC
61
62  Serial.print("get value: \	\	");
63  Serial.println(scale.get_value(5));		// print the average of 5 readings from  the ADC minus the tare weight, set with tare()
64
65  Serial.print("get units:  \	\	");
66  Serial.println(scale.get_units(5), 1);        // print the average  of 5 readings from the ADC minus tare weight, divided
67						// by the SCALE  parameter set with set_scale
68
69  Serial.println("Readings:");
70}
71
72void  loop() {
73  Serial.print("one reading:\	");
74  Serial.print(10*scale.get_units(),  1);
75  Serial.print("\	| average:\	");
76  Serial.println(10*scale.get_units(10),  1);
77
78
79
80
81
82if(10*scale.get_units()<185)
83{
84  analogWrite(9,255);
85  analogWrite(10,0);
86  analogWrite(11,0);
87  }
88 else if(10*scale.get_units()<220)
89  {
90    analogWrite(9,255);
91    analogWrite(10,0);
92    analogWrite(11,100);
93   }
94    else if(10*scale.get_units()<270)
95  {
96    analogWrite(9,0);
97    analogWrite(10,0);
98    analogWrite(11,200);
99   }
100    else if(10*scale.get_units()<320)
101  {
102    analogWrite(9,0);
103    analogWrite(10,255);
104    analogWrite(11,0);
105   }
106   else{
107   analogWrite(9,100);
108  analogWrite(10,200);
109  analogWrite(11,200);}
110
111
112
113
114
115
116
117
118  
119  scale.power_down();			        
120  delay(5);
121  scale.power_up();
122}
123

1/**
2 *
3 * HX711 library for Arduino - example file
4 * https://github.com/bogde/HX711
5
6  *
7 * MIT License
8 * (c) 2018 Bogdan Necula
9 *
10**/
11#include "HX711.h"
12
13
14//
15  HX711 circuit wiring
16const int LOADCELL_DOUT_PIN = 2;
17const int LOADCELL_SCK_PIN
18  = 3;
19
20
21HX711 scale;
22
23void setup() {
24  Serial.begin(38400);
25
26  Serial.println("HX711 Demo");
27  pinMode(9,OUTPUT);
28   pinMode(10,OUTPUT);
29
30    pinMode(11,OUTPUT);
31
32  Serial.println("Initializing the scale");
33
34
35  // Initialize library with data output pin, clock input pin and gain factor.
36
37  // Channel selection is made by passing the appropriate gain:
38  // - With a
39  gain factor of 64 or 128, channel A is selected
40  // - With a gain factor of
41  32, channel B is selected
42  // By omitting the gain factor parameter, the library
43
44  // default "128" (Channel A) is used here.
45  scale.begin(LOADCELL_DOUT_PIN,
46  LOADCELL_SCK_PIN);
47
48  Serial.println("Before setting up the scale:");
49
50  Serial.print("read: \	\	");
51  Serial.println(scale.read());			// print
52  a raw reading from the ADC
53
54  Serial.print("read average: \	\	");
55
56  Serial.println(scale.read_average(20));  	// print the average of 20 readings
57  from the ADC
58
59  Serial.print("get value: \	\	");
60  Serial.println(scale.get_value(5));		//
61  print the average of 5 readings from the ADC minus the tare weight (not set yet)
62
63
64  Serial.print("get units: \	\	");
65  Serial.println(scale.get_units(5), 1);	//
66  print the average of 5 readings from the ADC minus tare weight (not set) divided
67						//
68  by the SCALE parameter (not set yet)
69
70  scale.set_scale(2280.f);                      //
71  this value is obtained by calibrating the scale with known weights; see the README
72  for details
73  scale.tare();				        // reset the scale to 0
74
75  Serial.println("After
76  setting up the scale:");
77
78  Serial.print("read: \	\	");
79  Serial.println(scale.read());
80                 // print a raw reading from the ADC
81
82  Serial.print("read
83  average: \	\	");
84  Serial.println(scale.read_average(20));       // print
85  the average of 20 readings from the ADC
86
87  Serial.print("get value: \	\	");
88
89  Serial.println(scale.get_value(5));		// print the average of 5 readings from
90  the ADC minus the tare weight, set with tare()
91
92  Serial.print("get units:
93  \	\	");
94  Serial.println(scale.get_units(5), 1);        // print the average
95  of 5 readings from the ADC minus tare weight, divided
96						// by the SCALE
97  parameter set with set_scale
98
99  Serial.println("Readings:");
100}
101
102void
103  loop() {
104  Serial.print("one reading:\	");
105  Serial.print(10*scale.get_units(),
106  1);
107  Serial.print("\	| average:\	");
108  Serial.println(10*scale.get_units(10),
109  1);
110
111
112
113
114
115if(10*scale.get_units()<185)
116{
117  analogWrite(9,255);
118
119  analogWrite(10,0);
120  analogWrite(11,0);
121  }
122 else if(10*scale.get_units()<220)
123
124  {
125    analogWrite(9,255);
126    analogWrite(10,0);
127    analogWrite(11,100);
128
129   }
130    else if(10*scale.get_units()<270)
131  {
132    analogWrite(9,0);
133
134    analogWrite(10,0);
135    analogWrite(11,200);
136   }
137    else if(10*scale.get_units()<320)
138
139  {
140    analogWrite(9,0);
141    analogWrite(10,255);
142    analogWrite(11,0);
143
144   }
145   else{
146   analogWrite(9,100);
147  analogWrite(10,200);
148  analogWrite(11,200);}
149
150
151
152
153
154
155
156
157
158  
159  scale.power_down();			        
160  delay(5);
161  scale.power_up();
162}
163